657424426 has 4 divisors (see below), whose sum is σ = 986136642. Its totient is φ = 328712212.

The previous prime is 657424379. The next prime is 657424441. The reversal of 657424426 is 624424756.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 595408801 + 62015625 = 24401^2 + 7875^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164356105 + ... + 164356108.

Almost surely, 2^657424426 is an apocalyptic number.

657424426 is a deficient number, since it is larger than the sum of its proper divisors (328712216).

657424426 is a wasteful number, since it uses less digits than its factorization.

657424426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328712215.

The product of its digits is 322560, while the sum is 40.

The square root of 657424426 is about 25640.2891169347. The cubic root of 657424426 is about 869.5247441721.

The spelling of 657424426 in words is "six hundred fifty-seven million, four hundred twenty-four thousand, four hundred twenty-six".